PL content of the emulsion with added soybean lecithin was measured to be 2.76 mg/kg before oxidation. which was lower than the expected level (274.4 mg/kg) since soybean lecithin with 78.40% of purity was added at 350 mg/kg. This suggests that some of PL in soybean lecithin were lost during PL analysis, with 92.1% of recovery. Content of PC (100.88 mg/kg) PE (90.26 mg/kg), and PI (61.62 mg/kg) corresponded to 39.9. 35.7, and 24.4%, respectively, of total PL content. There was no PS detected in the enulsions, possibly due to a very low amount compared to other PLs. During iron-catalyzed or chlorophy photosensitized oxidation at 25 C, PL contents in the canola oil emulsions significantly decreased (Figure 2) indicating PL degradation. However, PL composition changed little. with a slight decrease in the relative content of PE and an increase in PI. After 10 d of oxidation catalyzed by iron, contents of PO. PE, and Pl